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Cold rolled grain oriented silicon steel, commonly known as CRGO silicon steel, is a specialized type of electrical steel that is meticulously engineered to exhibit exceptional magnetic properties, making it an ideal material for applications where efficient energy transfer is crucial. The term “grain oriented” means the deliberate alignment of crystal grains in a specific direction during the manufacturing process. This alignment allows the material to demonstrate superior magnetic properties along the rolling direction, facilitating efficient flux flow and reduced energy losses.
The manufacturing process of CRGO steel involves several critical steps.
It begins with the production of high-quality silicon steel slab, which is then hot rolled into the desired thickness. The next crucial phase involves cold rolling the silicon steel at controlled temperatures to achieve the desired grain orientation. This process is followed by annealing, which helps to further refine the grain structure and enhance magnetic properties. Finally, the crgo silicon steel is coated with insulating material to minimize eddy current losses.
| Type | Grade | Thickness
(mm) |
Theoretical Density
(kg/dm3) |
Core Loss Value P17/50 (W/kg) | Magnetic Induction B8(T) |
| Common CRGO Silicon Steel | B23G110 | 0.23 | 7.65 | 1.1 | 1.8 |
| B23G120 | 1.2 | 1.8 | |||
| B27G120 | 0.27 | 7.65 | 1.2 | 1.8 | |
| B27G130 | 1.3 | 1.8 | |||
| B30G120 | 0.3 | 7.65 | 1.2 | 1.8 | |
| B30G130 | 1.3 | 1.8 | |||
| B30G140 | 1.4 | 1.8 | |||
| B35G135 | 0.35 | 7.65 | 1.35 | 1.8 | |
| B35G145 | 1.45 | 1.8 | |||
| B35G155 | 1.55 | 1.8 | |||
| High magnetic induction CRGO Silicon Steel | B23P090 | 0.23 | 7.65 | 0.9 | 1.87 |
| B23P095 | 0.95 | 1.87 | |||
| B23P100 | 1 | 1.87 | |||
| B27P095 | 0.27 | 7.65 | 0.95 | 1.88 | |
| B27P100 | 1 | 1.88 | |||
| B27P110 | 1.1 | 1.88 | |||
| 330P100 | 0.3 | 7.65 | 1 | 1.88 | |
| B30P105 | 1.05 | 1.88 | |||
| B30P110 | 1.1 | 1.88 | |||
| B30P120 | 1.2 | 1.88 | |||
| B35P115 | 0.35 | 7.65 | 1.15 | 1.88 | |
| B35P125 | 1.25 | 1.88 | |||
| B35P135 | 1.35 | 1.88 |
Several properties make CRGO silicon steel the right choice for making the cores of transformers, motors, generators, and other electrical devices.
1. Directional Grain Orientation
The term “grain oriented” refers to the directional alignment of the crystal grains within the steel. In CRGO silicon steel, the grains are intentionally oriented in a specific direction during the manufacturing process. This alignment allows the material to exhibit superior magnetic properties along the rolling direction, enabling efficient flux flow and reduced energy losses.
2. Low Core Losses
It is engineered to minimize core losses, also known as iron losses, which occur as a result of the magnetic properties of the material. Compared to non-oriented electrical steels, it has lower core losses.
3. High Magnetic Permeability
Additionally, CRGO silicon steel exhibits high magnetic permeability, allowing it to effectively conduct magnetic flux. This characteristic contributes to the overall performance and energy efficiency of the electrical systems.
4. High Resistivity
Another important property of CRGO silicon steel is its high resistivity levels. When silicon is added to the steel, it increases its resistivity which is otherwise quite low. This high resistivity then reduces the core losses by minimizing the eddy current components there. Thus, the overall transformer working gets optimized.
5. High Mechanical Elasticity
Additionally, CRGO silicon steel also offers exceptionally high mechanical elasticity. So when it is used in the core of transformers or any other motor or component, they add to their life. Mechanical elasticity helps when the object comes under strain, thereby allowing it to retain its shape.
6. Excellent Insulation Coating
To prevent the formation of eddy currents, which can lead to energy losses and heat generation, the individual laminations of CRGO silicon steel are coated with an insulating material. This insulation serves to isolate the magnetic flux within each lamination, enhancing the overall efficiency of the transformer core.
7. Great Efficiency and Sustainability
The utilization of CRGO silicon steel in transformer cores is pivotal in achieving energy efficiency and sustainability in electrical systems. By minimizing energy losses in transformers, CRGO silicon steel aids in reducing power wastage and improving the overall efficiency of electrical infrastructure. This not only leads to cost savings but also contributes to the broader goal of sustainable energy usage and reduced environmental impact.
8. Wide in Sizes and Options
At Gnee Steel, our cold rolled grain-oriented silicon steel products are sold in several common forms, including:
Cold rolled grain oriented silicon steel coil
Cold rolled grain oriented silicon steel sheet
Cold rolled grain oriented silicon steel strip
If you have the need, welcome to contact us at any time!
Its exceptional magnetic properties, low core losses, and high magnetic permeability make cold rolled grain oriented silicon steel an indispensable material in the construction of high-performance electrical devices.
1. CRGO silicon steel finds its primary application in the construction of transformer cores for power distribution and electrical infrastructure.
2. It can also find applications in the production of generators and motors, where low core loss and high permeability are essential for efficient operation.
3. It can also find applications in the manufacturing of inductors, magnetic amplifiers, reactors, and other high-performance electrical devices.
4. It can also be used for noise and vibration reduction purposes because of its property of reduced magnetostriction.
5. It can also be used to manufacture energy-saving electrical devices.
6. It offers low current losses so it’s excessively used in making different machine parts and automotive components.
